This rucksack weighs 1500g; adjustable back system with airflow chimney; well-padded back and hipbelt; mesh wand pockets; rain cover in base; hydration system-compatible; external, internal lid pocket; superb price. But some other sacks are lighter or allow more airflow around the back; do you need an adjustable back system on such a small capacity sack?Verdict Best rucksack in our test under £50 and ideal if a budget, but for more money you get a lighter sack with more airflow.